Dock construction



Patented Aug. l0, 1926.

UNITED STATES ANDREW J'ACOBSON, OF SEATTLE, WASHINGTON.

DOCK CONSTRUCTION.

Application led December 17, 1923. Serial No. 681,289.

This invention relates to an improvement in dock or like constructions, particularly in providing for the protection of piles or the like as ordinarily arranged to support a dock.

The invention is particularly concerned in providin0` a series of relatively small units of concrete or the like, which may be readily associated and which are of a size to permit them to be completed during the periods at which the tide is sufiiciently low to 'permit working. l v l The invention is illustrated in the accompanying drawings, in which:

Ilig. l is a perspective view showing .the provision of two associated units to illustrate the general construction o-f the units and their connection in forming the substructure.

Fig. 2 is a plan showing a series of units connected for the support of a doel: or the like.

Fig. 3 is a perspective view partly broken out of a unit in position.

rl`he usual .substructure for supporting a doclr consists of a series of wooden piles l, which may be driven an appropriate depth into the ground in any usual or preferred manner. In providing the improved sub-structure, forms of any well known material are built in double wall form, that is, an inner and outer wall 2 and 3 to inclose the space surrounding say three V spaced piles l. The hollow material of the inner wall 3 is bridged by transverse walls /l arranged between adjacent piles and providing a hollow bridge wall. The top of the form for the hollow bridge wall terminates below the hollow form for the main outer wall, but above the upper ends of the piles l. The end `sections of' the outer wall 2 of the main wad form are provided with projections at one end as 5 and recesses at the opposite. end as 6, so that these wall sections may interfit in a manner to prevent the passage of any material as mud or silt between them.

After the respective form units have been positioned throughout the dock sub-structure, concrete or the like material is poured into the outer wall form and into the bridge wall forms, forming outer concrete walls 3 and concrete bridge walls A. The projections 5 and recesses 6 of the forms result in recesses 5 and projections 6 in the concrete walls for rthe interfitting of adjacent sections. After the concrete has set, the forms are removed, and mud or silt indicated at 2 is forced into the interior of the outer wall form to approximately the level of the bridge walls L This filling is allowed to settle for the usual period and a concrete filling is then :laced on top of the mud or silt filling to provide an upper so-lid section which joins the bridge walls and overlies the piles.

If desired and as preferred, screen sections 7 may be and preferably are placed in position bridging the joints between the units yto assist in preventing the passage of silt or mud between the joints.

The sub-structure thus formed is made .up of comparatively small units which may be readily' arranged and built during the comparatively short periods at whichv the tide is sufficiently low for the purpose, which units completely inclose or house the ordinary piling for the protection of the latter, without requiring an unusually large quantity of concrete material for the purpose.

What I claim is:

l. A method of dock construction, consisting of the inclosing of a plurality of piles in a concrete inclosure, the walls of which extend from the bed of the body of water to a point above the tops of the piles, the separation of the piles by relatively thin concrete webs, the filling of the space within the inclosure with suitable filling material to a point slightly below the tops of the piles, and the subsequent covering of the tops of the piles and webs with concrete. Y

2. A sub-structure for docks or the like, having supporting piling, comprising an outer wall of concrete or the like, inclosing a number of piles7 bridge walls connecting the inner surfaces ofthe outer wall and ar Y ANDREW JACOBSON. 

